"I will of course be sad to leave St Helens and will always be thankful for the opportunity and support that the club and its amazing fans gave to me," he said.

"I will never forget my experience at St Helens and hope to replicate it in my next challenge with the Gold Coast Titans."

Titans chairman Dennis Watt hopes Holbrook can follow in the footsteps of Michael Maguire and Robinson by winning an NRL title after coaching in the Super League.

"I think everyone in rugby league would be aware of the tremendous success that Justin has enjoyed in Super League, rebuilding St Helens to the top of Super League and taking them to the Challenge Cup final," he said.

"Justin is very highly regarded and it is a tremendous vote of confidence in the future of the Titans and the work that is already being done at the club that he has chosen the Gold Coast to begin his NRL career."